Closing of a project is a responsibility of: b. Worker c. Employee a. Project Manager d. All of the above.

The answer is **a. Project Manager**.<br /><br />While the project team members (workers/employees) are involved in the closing activities like documentation and handover, the ultimate responsibility for formally closing the project rests with the Project Manager. They oversee the entire process, ensure completion of all necessary steps, and sign off on the project closure.<br />